The owner of a toy store can be referred to as "toy store owner" or simply "toy store proprietor".

来源: 该称呼是从英文单词"proprietor"和"owner"派生而来，意为（商店，餐馆等）老板，所有人。

例句:

As the toy store owner, I'm always looking for ways to make the shopping experience more enjoyable for my customers.
The toy store proprietor was happy to hear that sales had increased during the hopday season.

中文翻译:

作为玩具店老板，我总是在寻找让顾客购物体验更愉快的方法。
玩具店老板很高兴听到假期销售增加了。